Vulnerability-Lookup

GHSA-9RCV-5G2J-597R

Vulnerability from github – Published: 2026-02-14 18:30 – Updated: 2026-02-14 18:30

Details

In the Linux kernel, the following vulnerability has been resolved:

smb/client: fix memory leak in smb2_open_file()

Reproducer:

server: directories are exported read-only
client: mount -t cifs //${server_ip}/export /mnt
client: dd if=/dev/zero of=/mnt/file bs=512 count=1000 oflag=direct
client: umount /mnt
client: sleep 1
client: modprobe -r cifs

The error message is as follows:

============================================================================= BUG cifs_small_rq (Not tainted): Objects remaining on __kmem_cache_shutdown()

Object 0x00000000d47521be @offset=14336 ... WARNING: mm/slub.c:1251 at __kmem_cache_shutdown+0x34e/0x440, CPU#0: modprobe/1577 ... Call Trace: kmem_cache_destroy+0x94/0x190 cifs_destroy_request_bufs+0x3e/0x50 [cifs] cleanup_module+0x4e/0x540 [cifs] __se_sys_delete_module+0x278/0x400 __x64_sys_delete_module+0x5f/0x70 x64_sys_call+0x2299/0x2ff0 do_syscall_64+0x89/0x350 entry_SYSCALL_64_after_hwframe+0x76/0x7e ... kmem_cache_destroy cifs_small_rq: Slab cache still has objects when called from cifs_destroy_request_bufs+0x3e/0x50 [cifs] WARNING: mm/slab_common.c:532 at kmem_cache_destroy+0x16b/0x190, CPU#0: modprobe/1577

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{
  "affected": [],
  "aliases": [
    "CVE-2026-23205"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-02-14T17:15:58Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb/client: fix memory leak in smb2_open_file()\n\nReproducer:\n\n  1. server: directories are exported read-only\n  2. client: mount -t cifs //${server_ip}/export /mnt\n  3. client: dd if=/dev/zero of=/mnt/file bs=512 count=1000 oflag=direct\n  4. client: umount /mnt\n  5. client: sleep 1\n  6. client: modprobe -r cifs\n\nThe error message is as follows:\n\n  =============================================================================\n  BUG cifs_small_rq (Not tainted): Objects remaining on __kmem_cache_shutdown()\n  -----------------------------------------------------------------------------\n\n  Object 0x00000000d47521be @offset=14336\n  ...\n  WARNING: mm/slub.c:1251 at __kmem_cache_shutdown+0x34e/0x440, CPU#0: modprobe/1577\n  ...\n  Call Trace:\n   \u003cTASK\u003e\n   kmem_cache_destroy+0x94/0x190\n   cifs_destroy_request_bufs+0x3e/0x50 [cifs]\n   cleanup_module+0x4e/0x540 [cifs]\n   __se_sys_delete_module+0x278/0x400\n   __x64_sys_delete_module+0x5f/0x70\n   x64_sys_call+0x2299/0x2ff0\n   do_syscall_64+0x89/0x350\n   entry_SYSCALL_64_after_hwframe+0x76/0x7e\n  ...\n  kmem_cache_destroy cifs_small_rq: Slab cache still has objects when called from cifs_destroy_request_bufs+0x3e/0x50 [cifs]\n  WARNING: mm/slab_common.c:532 at kmem_cache_destroy+0x16b/0x190, CPU#0: modprobe/1577",
  "id": "GHSA-9rcv-5g2j-597r",
  "modified": "2026-02-14T18:30:16Z",
  "published": "2026-02-14T18:30:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23205"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3a6d6b332f92990958602c1e35ce0173e2dd62e9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/743f70406264348c0830f38409eb6c40a42fb2db"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9ee608a64e37cea5b4b13e436c559dd0fb2ad1b5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b64e3b5d8d759dd4333992e4ba4dadf9359952c8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e3a43633023e3cacaca60d4b8972d084a2b06236"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-23205 (GCVE-0-2026-23205)

Vulnerability from cvelistv5 – Published: 2026-02-14 16:27 – Updated: 2026-02-14 16:27

Title

smb/client: fix memory leak in smb2_open_file()

Summary

In the Linux kernel, the following vulnerability has been resolved: smb/client: fix memory leak in smb2_open_file() Reproducer: 1. server: directories are exported read-only 2. client: mount -t cifs //${server_ip}/export /mnt 3. client: dd if=/dev/zero of=/mnt/file bs=512 count=1000 oflag=direct 4. client: umount /mnt 5. client: sleep 1 6. client: modprobe -r cifs The error message is as follows: ============================================================================= BUG cifs_small_rq (Not tainted): Objects remaining on __kmem_cache_shutdown() ----------------------------------------------------------------------------- Object 0x00000000d47521be @offset=14336 ... WARNING: mm/slub.c:1251 at __kmem_cache_shutdown+0x34e/0x440, CPU#0: modprobe/1577 ... Call Trace: <TASK> kmem_cache_destroy+0x94/0x190 cifs_destroy_request_bufs+0x3e/0x50 [cifs] cleanup_module+0x4e/0x540 [cifs] __se_sys_delete_module+0x278/0x400 __x64_sys_delete_module+0x5f/0x70 x64_sys_call+0x2299/0x2ff0 do_syscall_64+0x89/0x350 entry_SYSCALL_64_after_hwframe+0x76/0x7e ... kmem_cache_destroy cifs_small_rq: Slab cache still has objects when called from cifs_destroy_request_bufs+0x3e/0x50 [cifs] WARNING: mm/slab_common.c:532 at kmem_cache_destroy+0x16b/0x190, CPU#0: modprobe/1577

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/743f70406264348c0…
	https://git.kernel.org/stable/c/3a6d6b332f9299095…
	https://git.kernel.org/stable/c/b64e3b5d8d759dd43…
	https://git.kernel.org/stable/c/9ee608a64e37cea5b…
	https://git.kernel.org/stable/c/e3a43633023e3caca…

Impacted products

Vendor

Product

Version

Linux

Affected: 17e53a15e64b65623b8f2b1185d27d7b1cbf69ab , < 743f70406264348c0830f38409eb6c40a42fb2db (git)
Affected: 18066188eb90cc0c798f3370a8078a79ddb73f70 , < 3a6d6b332f92990958602c1e35ce0173e2dd62e9 (git)
Affected: 6ebb9d54eccc8026b386e76eff69364d33373da5 , < b64e3b5d8d759dd4333992e4ba4dadf9359952c8 (git)
Affected: e255612b5ed9f179abe8196df7c2ba09dd227900 , < 9ee608a64e37cea5b4b13e436c559dd0fb2ad1b5 (git)
Affected: e255612b5ed9f179abe8196df7c2ba09dd227900 , < e3a43633023e3cacaca60d4b8972d084a2b06236 (git)
Affected: bcd15f06c7e8904116cfb06526bcc189b86aff85 (git)

Linux

Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 6.1.163 , ≤ 6.1.* (semver)
Unaffected: 6.6.124 , ≤ 6.6.* (semver)
Unaffected: 6.12.70 , ≤ 6.12.* (semver)
Unaffected: 6.18.10 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/smb2file.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "743f70406264348c0830f38409eb6c40a42fb2db",
              "status": "affected",
              "version": "17e53a15e64b65623b8f2b1185d27d7b1cbf69ab",
              "versionType": "git"
            },
            {
              "lessThan": "3a6d6b332f92990958602c1e35ce0173e2dd62e9",
              "status": "affected",
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              "versionType": "git"
            },
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              "lessThan": "b64e3b5d8d759dd4333992e4ba4dadf9359952c8",
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              "versionType": "git"
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              "status": "affected",
              "version": "e255612b5ed9f179abe8196df7c2ba09dd227900",
              "versionType": "git"
            },
            {
              "lessThan": "e3a43633023e3cacaca60d4b8972d084a2b06236",
              "status": "affected",
              "version": "e255612b5ed9f179abe8196df7c2ba09dd227900",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "bcd15f06c7e8904116cfb06526bcc189b86aff85",
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            }
          ]
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          "product": "Linux",
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            "fs/smb/client/smb2file.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.15"
            },
            {
              "lessThan": "6.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.163",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.124",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.70",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.163",
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                  "vulnerable": true
                },
                {
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                  "versionStartIncluding": "6.6.93",
                  "vulnerable": true
                },
                {
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                },
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                  "vulnerable": true
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                {
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              ],
              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb/client: fix memory leak in smb2_open_file()\n\nReproducer:\n\n  1. server: directories are exported read-only\n  2. client: mount -t cifs //${server_ip}/export /mnt\n  3. client: dd if=/dev/zero of=/mnt/file bs=512 count=1000 oflag=direct\n  4. client: umount /mnt\n  5. client: sleep 1\n  6. client: modprobe -r cifs\n\nThe error message is as follows:\n\n  =============================================================================\n  BUG cifs_small_rq (Not tainted): Objects remaining on __kmem_cache_shutdown()\n  -----------------------------------------------------------------------------\n\n  Object 0x00000000d47521be @offset=14336\n  ...\n  WARNING: mm/slub.c:1251 at __kmem_cache_shutdown+0x34e/0x440, CPU#0: modprobe/1577\n  ...\n  Call Trace:\n   \u003cTASK\u003e\n   kmem_cache_destroy+0x94/0x190\n   cifs_destroy_request_bufs+0x3e/0x50 [cifs]\n   cleanup_module+0x4e/0x540 [cifs]\n   __se_sys_delete_module+0x278/0x400\n   __x64_sys_delete_module+0x5f/0x70\n   x64_sys_call+0x2299/0x2ff0\n   do_syscall_64+0x89/0x350\n   entry_SYSCALL_64_after_hwframe+0x76/0x7e\n  ...\n  kmem_cache_destroy cifs_small_rq: Slab cache still has objects when called from cifs_destroy_request_bufs+0x3e/0x50 [cifs]\n  WARNING: mm/slab_common.c:532 at kmem_cache_destroy+0x16b/0x190, CPU#0: modprobe/1577"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-14T16:27:28.409Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
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          "url": "https://git.kernel.org/stable/c/743f70406264348c0830f38409eb6c40a42fb2db"
        },
        {
          "url": "https://git.kernel.org/stable/c/3a6d6b332f92990958602c1e35ce0173e2dd62e9"
        },
        {
          "url": "https://git.kernel.org/stable/c/b64e3b5d8d759dd4333992e4ba4dadf9359952c8"
        },
        {
          "url": "https://git.kernel.org/stable/c/9ee608a64e37cea5b4b13e436c559dd0fb2ad1b5"
        },
        {
          "url": "https://git.kernel.org/stable/c/e3a43633023e3cacaca60d4b8972d084a2b06236"
        }
      ],
      "title": "smb/client: fix memory leak in smb2_open_file()",
      "x_generator": {
        "engine": "bippy-1.2.0"
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23205",
    "datePublished": "2026-02-14T16:27:28.409Z",
    "dateReserved": "2026-01-13T15:37:45.986Z",
    "dateUpdated": "2026-02-14T16:27:28.409Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-9RCV-5G2J-597R

CVE-2026-23205 (GCVE-0-2026-23205)

Tags

Sightings

Nomenclature